Always be careful in your business, there are about 4 other different means they can do this kind of scam to defraud POS agents their capital, if you are not vigilant enough, you could fall victims to any of those four methods. These scam methods doesn't only work on POS agents but if you are running a business where you normal get so much cash in cash out, you are likely to experience it if you are not careful. Some of my clients lost so much money through this process.